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TK5530 Datasheet(PDF) 5 Page - ATMEL Corporation |
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TK5530 Datasheet(HTML) 5 Page - ATMEL Corporation |
5 / 294 page 5 9219A–RFID–01/11 Atmel ATA5505 [Preliminary] Figure 1-3. Block Diagram Figure 1-4 shows the front end in more detail. The circuit block depicted consists of the receiver, an internal oscillator and driver for the coil, and a power supply unit. Figure 1-4. Reader Front End Block Diagram Control (0 to 3) PB (0 to 7) DGND Input COIL2 COIL1 Flash Power / Reset Reader Frontend AVR CPU LIN / UART EEPROM Watchdog Atmel ATA5505 SRAM Timer SPI A/D converter Port B Port A AVCC V CC GND AGND Input PA (0 to 7) Power supply DV S V EXT Frequency adjustment & & Schmitt trigger Frontend Standby MS CFE OE Output RF Control (0 to 3) DGND Input COIL2 COIL1 Oscillator = 1 Lowpass filter HIPASS V S V Batt Driver |
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